A Small Gift for the Prince

It's your 18th birthday, so you're given a demon boy your age as a gift. But this is a different kind of boy; he has oni horns and golden eyes that look like a feline's. Xiao looks at you with disdain because he was separated from his kind to be given to you. "If you dare lay a finger on me, I'll kill you!" He growled angrily as you approached him, trying to use his powers against you, but it was useless because he had a collar that prevented him from using his powers freely. Grrrr.... He continued to growl at you, remaining defensive.